Segment Data Operating Performance (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Net revenues (excluding intercompany fees and sales)										$ 10,233.1		$ 7,267.1		$ 3,905.8
Intercompany fees and sales										0.0		0.0		292.1	[1]
Operating costs and expenses:
Cost of materials and other										8,560.5		6,327.6		3,812.9
Operating expenses (excluding depreciation and amortization presented below)										645.0		429.0		249.3
Insurance proceeds - business interruption										0.0		0.0		(42.4)
Segment contribution margin										1,027.6		510.5		178.1
Depreciation and amortization										199.4		153.3		116.4
General and administrative expenses										247.6		175.9		106.1
Other operating expense, net										(31.3)		1.0		4.8
Operating income (loss)	$ 182.8	$ 255.2	$ 135.1	$ 38.8	$ 112.5		$ 90.8	$ (46.5)	$ 29.8	611.9		180.3		(49.2)
Capital spending (excluding business combinations)										317.2	[2]	177.5	[3]	46.3	[3]
Total assets	5,760.6				5,935.2	[4]				5,760.6		5,935.2	[4]
Assets held for sale	0.0				160.0					0.0		160.0
Logistics
Segment Reporting Information [Line Items]
Intercompany fees and sales										349.0		57.5		26.0
Operating Segments | Refining
Segment Reporting Information [Line Items]
Net revenues (excluding intercompany fees and sales)										8,771.4		6,364.5		3,605.1
Operating costs and expenses:
Cost of materials and other										8,279.9		5,852.2		3,614.1
Operating expenses (excluding depreciation and amortization presented below)										465.4		317.7		212.4
Insurance proceeds - business interruption														(42.4)
Segment contribution margin										865.1		450.7		139.1
Depreciation and amortization										133.7		109.2		88.2
Capital spending (excluding business combinations)										203.9	[2]	128.2	[3]	27.9	[3]
Total assets	5,430.1				4,846.5	[4]				5,430.1		4,846.5	[4]
Operating Segments | Retail
Segment Reporting Information [Line Items]
Net revenues (excluding intercompany fees and sales)										915.4		426.7
Operating costs and expenses:
Cost of materials and other										755.8		350.3
Operating expenses (excluding depreciation and amortization presented below)										100.7		49.6
Segment contribution margin										58.9		26.8
Depreciation and amortization										24.6		7.0
Capital spending (excluding business combinations)										10.0	[2]	11.7	[3]
Total assets	310.6				331.4	[4]				310.6		331.4	[4]
Operating Segments | Logistics
Segment Reporting Information [Line Items]
Net revenues (excluding intercompany fees and sales)										416.8		382.3		301.3
Intercompany fees and sales										4.8
Operating costs and expenses:
Cost of materials and other										429.1		372.9		302.2
Operating expenses (excluding depreciation and amortization presented below)										58.7		43.3		37.2
Insurance proceeds - business interruption														0.0
Segment contribution margin										169.8		121.9		108.7
Depreciation and amortization										26.0		21.9		20.8
Capital spending (excluding business combinations)										11.6	[2]	18.4	[3]	11.8	[3]
Total assets	624.6				443.5	[4]				624.6		443.5	[4]
Corporate, Other and Eliminations
Segment Reporting Information [Line Items]
Net revenues (excluding intercompany fees and sales)										129.5		93.6		(0.6)
Intercompany fees and sales										(1,079.8)		(411.9)		(172.8)	[1]
Operating costs and expenses:
Cost of materials and other										(904.3)		(247.8)		(103.4)
Operating expenses (excluding depreciation and amortization presented below)										20.2		18.4		(0.3)
Insurance proceeds - business interruption														0.0
Segment contribution margin										(66.2)		(88.9)		(69.7)
Depreciation and amortization										15.1		15.2		7.4
Capital spending (excluding business combinations)										91.7	[2]	19.2	[3]	6.6	[3]
Total assets	(604.7)				313.8	[4]				(604.7)		313.8	[4]
Corporate, Other and Eliminations | Refining
Segment Reporting Information [Line Items]
Intercompany fees and sales										839.0		256.1		318.1	[1]
Corporate, Other and Eliminations | Retail
Segment Reporting Information [Line Items]
Intercompany fees and sales										0.0		0.0
Corporate, Other and Eliminations | Logistics
Segment Reporting Information [Line Items]
Intercompany fees and sales										240.8		155.8		146.8	[1]
Discontinued Operations, Held-for-sale | Retail Entities
Segment Reporting Information [Line Items]
Intercompany fees and sales												186.8		$ 292.1
Operating costs and expenses:
Capital expenditures, discontinued operations												14.4
Discontinued Operations, Held-for-sale | California Discontinued Entities
Operating costs and expenses:
Assets held for sale					$ 160.0							160.0
Capital expenditures, discontinued operations												$ 2.6
Big Spring Logistic Assets
Operating costs and expenses:
Transaction costs capitalized, related to acquisition	$ 0.4									$ 0.4

[1] Intercompany fees and sales for the refining segment include revenues from the Retail Entities of $292.1 million during the year ended December 31, 2016, the operations of which are reported in discontinued operations.

[2] Capital spending excludes transaction costs capitalized in the amount of $0.4 million during the year ended December 31, 2018, that relate to the Big Spring Logistic Assets Acquisition.

[3] Capital spending excludes capital spending associated with the California Discontinued Entities of $2.6 million during the year ended December 31, 2017. Capital spending excludes capital spending associated with the Retail Entities of $14.4 million during the year ended December 31, 2017 .

[4] Assets held for sale of $160.0 million are included in the corporate, other and eliminations segment as of December 31, 2017.